My preference is MIL vs MOA when dialing and reading reticles...I'll go ahead and state that my preference is FFP over SFP, but I can live with SFP in a scope that maxes at 10x if I have to. That said, specifically in regard to the 2 mentioned reticles in the NXS 2.5-10x42, if I was purchasing right now, for the conditions I hunt, I'd go with the MOAR.
I used the MIL-R in the past and it was ok in the open but the subtensions were to thin when hunting wooded areas. That coupled with the hollow outer bars made it tough to pick up in busy backgrounds. I recently picked up an SHV 3-10 with the MOAR and was pleasantly surprised by it. The outer bars were filled in with no hollow sections and the subtensions on the inner plex seemed bolder. This made it much easier to use in wooded/busy backgrounds than my previous experience with the MIL-R. I also appreciate the fact that only the inner most crosshair on the SHV is illuminated vs the entire measured area of the NXS.
Hunting reticles are the downfall of many Nightforce scopes....it's most obvious to me in the 2.5-10x42 NXS reticles. Nightforce reticles are a sore spot for me and it irritates me most with the 2.5-10 NXS as it could really stand out with a well designed hunting reticle. If they'd put a Forceplex subtended reticle with a 2.5 or 3 mil opening per side with mil dots and 1/2 mil hashes, illuminating only the inner most 1/2 mil plex, they'd have a GREAT hunting reticle....even though it's SFP. I waive my rights to the design to NF, call it the Mil-Force and send me one.....